export function setFetchAllowedUrls(hostnames: string[]): void;
export function getFetchAllowedUrls(): string[];
export function isBlockedUrl(url: string): boolean;
export function normalizeQuery(query: string): string;
export function toDedupeKey(url: string): string;
export function extractDomain(url: string): string;
export function detectFreshness(query: string): string | null;
export function detectDomainHints(query: string): string[];
